SOMA ORNAMENT-8, User Manual

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ORNAMENT • 8 USER MANUAL
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Input contact CV . The voltage at this pin controls the TIME pulse rate. Baud rate =
voltage at CV x TIME knob position.
An unconnected pin has a voltage of 3 volts.
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Output contact
CV
. With the phase switch in upper position and the cell activated, the
output voltage increases from 0 to 10 volts. With the phase switch in lower position and
the cell activated, the voltage at the contact drops from 10 volts to 0.
This output is designed to control the PULSAR, LYRA and any equipment that can receive
a CV signal from 0 to 10 volts.
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Output contact LYRA . While the cell is active, this contact is connected to ground. When
the cell is not active, the contact is not connected to anything. With the phase switch in
lower position, the behavior of the contact is inverted.
These outputs are designed to connect the ORNAMENT to the LYRA•8. Use the sensor overlay
adapter (sold separately) to connect to LYRA. Connect
LYRA
outputs to adapter pins 1–8.
Connect one of the pins of the adapter GND to one of the pins of the GND of ORNAMENT.
In ORNAMENT and adapter both GND contacts are ground. On the adapter, they are con‑
nected to the lower LYRA sensors (bottom row) and the instrument ground. In ORNAMENT,
both GND pins are connected to the ground of the instrument.
The
LYRA
contact, connected through the adapter to the LYRA, at the moment of acti‑
vation of the cell, connects the sensor to the ground, simulating a finger touching LYRA’s
sensor, and starts this voice of the instrument, thus allowing the ORNAMENT to control
the LYRA.
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Output contact
PULSAR
. In an active cell, this contact will have an output voltage of
10 volts. In an inactive cell, the output voltage is 0 volts. With the phase switch in lower
position, the output behavior is inverted.
This output is designed to control the PULSAR and any equipment that can receive a CV
signal from 0 to 10 volts.
HOW PULSE DELAY CELLS WORK
Each of the eight identical cells consists of a capacitor and a circuit that charges and dis‑
charges the capacitor. In the inactive state, the capacitor is discharged, the outputs CV
and PULSAR have a voltage of 0, and the output LYRA is open. In order to activate the
cell, it is necessary to supply a negative trigger pulse to the input
TRIG
(briefly connect
it to the ground or apply a voltage of less than 2.5 volts). The trigger pulse turns on the
charge circuit of the capacitor and it begins to charge. The charge rate of the capacitor
depends on the input voltage CV and the position of the TIME knob. This relationship can
be expressed by the following formula:
Charge rate = voltage at >
CV
x position of the
TIME
knob.
Thus, the higher the input voltage of CV and the closer the position of the TIME knob is
to the maximum, the higher the charge rate of the capacitor. Or, in other words, the pulse
transmission speed is higher and, accordingly, the pulse delay time or cell activity time is
smaller.
In the unconnected state, the input CV has a voltage of 3 volts, and the TIME knob works
referenced to it if nothing is connected to the input.
At the moment when the voltage on the capacitor r10 volts, it instantly discharges
and the cell goes into an inactive state. At the moment of transition to an inactive state, a
short negative pulse is generated at the output
TRIG
, which can be used to start / activate
any other cell, except for the cell that generated the pulse.
From the point of view of classical circuitry, each cell is a monostable multivibrator or a time